JOINT BASE PEARL HARBOR-HICKAM, Hawaii — The Air Force unit that defends Hawaii skies will get experimental energy technology that uses trash to generate power and relies on its own small electrical grid a system intended to keep the unit operating if a bomb, cyberattack or natural disaster knocks out the local utility.

HONOLULU Hawaii’s last sugar plantation is getting out of the sugar-growing business, signalling the end of an industry that once powered the local economy and lured thousands of immigrants to the islands.